The average diameter of the foramen spinosum is 2.63 mm in the adult.

It lies approximately 1.0 cm directly medial to the foramen spinosum.

It enters the skull through the foramen spinosum with the middle meningeal artery.

Wood-Jones (1931) found the foramen spinosum to be more or less incomplete in approx.

It accompanies the middle meningeal artery and vein as they enter the cranium through the foramen spinosum and supplies the dura mater.

Lateral to the foramen ovale is the foramen spinosum, for the passage of the middle meningeal vessels, and a recurrent branch from the mandibular nerve.

The foramen petrosum, a small occasional opening, between the foramen spinosum and foramen ovale, for transmission of the lesser petrosal nerve.

In rare cases, early division of the middle meningeal artery into a posterior and anterior division may result in a duplication of the foramen spinosum.

The foramen ovale and foramen spinosum open on its roof, and the alveolar canals on its anterior wall.

After branching off the maxillary artery in the infratemporal fossa, it runs through the foramen spinosum to supply the dura mater (the outermost meninges) and the calvaria.

The foramen spinosum and ovale may be continuous, and the foramen spinosum may be duplicated.

The foramen spinosum is one of several foramina located in the base of the skull, on the sphenoid bone, situated lateral to the foramen ovale, in a posterior angle.

It is pierced by the foramen ovale and foramen spinosum, and at its posterior part is the sphenoidal spine, which is frequently grooved on its medial surface for the chorda tympani nerve.

The anterior extent of such elevation is usually the foramen spinosum, but the middle meningeal artery can be divided between clips and elevation continued anteriorly to the foramen ovale if additional exposure is desired.

The earliest perfect ring-shaped formation of the foramen spinosum was observed in the 8th month after birth and the latest in 7 years after birth in a developmental study on the foramen rotundum, foramen ovale and foramen spinosum.

These furrows begin near the foramen spinosum, and the anterior runs forward and upward to the sphenoidal angle of the parietal, where it is sometimes converted into a bony canal; the posterior runs lateralward and backward across the temporal squama and passes on to the parietal near the middle of its lower border.